Mass
Terminology
Charge
Variations
True or False?
100
Most of the mass of the atom is found here.
What is the nucleus?
100
The number of protons in the atom is called this.
What is the atomic number?
100
These subatomic particles are positively charged.
What are protons?
100
The term used to describe the charge on a neutron.
What is neutral?
100
The nucleus of an atom has high density.
What is true?
200
These two particles are almost the same mass.
What are protons and neutrons?
200
The vertical columns in a periodic table are called this.
What are groups or families?
200
These subatomic particles are negatively charged.
What are electrons?
200
Atoms of the same element that have different numbers of neutrons are called this.
What is an isotope?
200
Dalton was correct in saying the atom was indivisible.
What is false?
300
Add the protons and neutrons together to get this.
What is the mass number?
300
The horizontal rows in the periodic table are called this.
What are periods?
300
The nucleus has this charge.
What is positive?
300
An atom that has lost or gained electrons.
What is an ion?
300
An atom with a mass of 40 and atomic number of 20 has 40 neutrons.
What is false? How many then?
400
It's the weighted average mass of the atoms in a naturally occurring sample of an element.
What is average atomic mass?
400
This is the unit for relative atomic mass.
What is atomic mass unit? (amu)
400
The electron cloud has this charge.
What is negative?
400
The first detailed atomic theory.
What is Dalton's atomic theory?
400
In the symbol to show the mass and the atomic number of an element, the top number is the mass number.
What is true. We need to look at some of these:)
500
The mass of 1/12 of a Carbon-12 atom.
What is an atomic mass unit? (amu)
500
This is the way you write the symbol for Carbon with a mass of 14.
What is C-14?
500
Atoms are electrically neutral unless this happens.
What is lose or gain electrons?
500
The mass number of an atom that has 10 protons and 12 neutrons.
What is 22?
500
The number of protons, the atomic number and the number of electrons are all the same number.
What is true?
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